At high discharge rates, the datasheet reveals a non-linear voltage drop. At 15A, the voltage sags from 4.2V to approximately 3.2V within the first 30 seconds, then gradually declines to 2.8V at cutoff. More critically, at 45°C ambient (a "hot" environment), the same 15A discharge yields only 3.8 Ah—a 10% capacity loss—due to increased self-discharge and reduced lithium diffusivity. Conversely, at 0°C, the cell cannot safely deliver 15A without lithium plating; the datasheet mandates derating to 8A below 10°C.
The NCR21700T is a preferred "game-changer" for several high-drain sectors: NCR21700 data sheet panasonic ncr21700t datasheet hot
The official safety data sheet notes that the NCR21700T has a thermal runaway threshold starting around (248°F–266°F). At high discharge rates, the datasheet reveals a
-20°C to +60°C. Surface temperatures should ideally not exceed 60°C during high-current operation to avoid degradation. Conversely, at 0°C, the cell cannot safely deliver